Also, another interesting thing about this is that the output of "show ethernet mac-learning-log" stops at April 13th. I have no idea why. If a MAC address were jumping around, we'd see it in the MAC learning log...if it were up to date. What would cause a Juniper switch to stop logging to the MAC learning log?
By the way, this is an EX4200 running 10.4R6.5. On Fri, Jun 7, 2013 at 4:07 PM, John Neiberger <[email protected]> wrote: > We're trying to troubleshoot an odd issue and this log output makes it > appear that a MAC address is flipping between interfaces. There are other > interfaces involved later in the logs. I'm starting to think this isn't > telling us what we think it's telling us. Does this indicate that the MAC > address really is being learned from multiple interfaces? The confusing > thing about the logs is the mention of l3nh. Is that layer three next hop? > If so, why are we seeing that in ethernet-level trace options and what is > the significance? > > I'm a little confused. Here is an example: > > Jun 4 13:07:22.953201 Attempt to add vlan sbc-core mac 00:08:25:fa:3c:82, > ifname ge-0/0/6.0, pnac_status 0, 0 > Jun 4 13:07:22.953312 vlan sbc-core mac 00:08:25:fa:3c:82 (tag 40), iif = > ge-0/0/6.0: present in FDB > Jun 4 13:07:22.953374 (3, 00:08:25:fa:3c:82) next-hop index change [1344 > -> 1328] > Jun 4 13:07:22.953562 KRT enqueue FDB (3, 00:08:25:fa:3c:82) nh-index 1328 > Jun 4 13:07:22.953712 krt_dequeue: type FDB op change 3, > 00:08:25:fa:3c:82 Direct nh 1328 > Jun 4 13:07:22.954372 l3nh_fdb_notify: FDB CHANGE vlan <sbc-core> mac > 00:08:25:fa:3c:82 > Jun 4 13:21:18.041160 Attempt to add vlan sbc-core mac 00:08:25:fa:3c:82, > ifname ge-0/0/5.0, pnac_status 0, 0 > Jun 4 13:21:18.041271 vlan sbc-core mac 00:08:25:fa:3c:82 (tag 40), iif = > ge-0/0/5.0: present in FDB > Jun 4 13:21:18.041332 (3, 00:08:25:fa:3c:82) next-hop index change [1328 > -> 1327] > Jun 4 13:21:18.041670 Attempt to add vlan sbc-core mac 00:08:25:fa:3c:82, > ifname ge-0/0/6.0, pnac_status 0, 0 > Jun 4 13:21:18.041767 vlan sbc-core mac 00:08:25:fa:3c:82 (tag 40), iif = > ge-0/0/6.0: present in FDB > Jun 4 13:21:18.041807 (3, 00:08:25:fa:3c:82) next-hop index change [1327 > -> 1328] > Jun 4 13:21:18.041962 KRT enqueue FDB (3, 00:08:25:fa:3c:82) nh-index 1328 > > It looks to me like the MAC address is jumping around. What do you think? > > Thanks, > John > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
